Was it a Run capacitor or a Start capacitor?
I would guess it is both, but apparently to cause an overheating issue it must be a "run cap" -- it is absolutely amazing: pump ran all night without stopping on the high setting with the new CAP.
So I have a $20 fix to a perplexing issue, but I had to figure this out -- nowhere does anyone allude to this phenomenon -- I just figured this (change CAP) was something I could do before I called out an expert.
Was there anything abnormal about the appearance of the cap? Did it look swollen or were any of the terminals burnt? Also, did you happen to test the cap with a meter or anything?
No -- the old CAP looked very "normal" -- I did shunt the contacts to make sure it was discharged before I removed the connections -- I don't know if the capacitor material is liquid or film, but there was no evidence of any "leakage" --
I wonder if the prior month 30 day string of 100+ degree days had an effect on the CAP??? Anyway, replacing the CAP restored my system to normal operation. Just FYI: I run 3 hrs on HIGH and 8.5 hrs on LOW -- pump comes on @ 7 AM every morning.